my country will develop from a large drying country to a drying country, and there is still a long way to go. We must first invest in scientific research. Without scientific research investment, there will be no new jisg. Without new jisg, we cannot produce a dryer with low cost and good quality. Of course, we also have many favorable conditions, the most important of which is the low labor price in China and the support and support policies for the machinery industry. I believe that as long as the dryer manufacturers in China can grasp and develop as soon as possible, in the near future, our dryers Enterprises can stand in the world. But now, taking the grain dryer as an example, the main problems that still exist are: insufficient drying capacity, complicated drying models, backward drying process, large amount of civil engineering, and no established manufacturers. Standardization and serialization, low thermal efficiency and high unit energy consumption. There is still a large gap between my country's grain dryer equipment and foreign countries, mainly as follows:
① The number of dryers is small, and the level of drying mechanization is low. According to the statistics of the original Ministry of Machinery, the number of agricultural grain dryers in my country was about 10,000 in 1980, and by 1990 it was about 3,000. It is 1/300 of the amount of Japanese dryer. According to statistics in recent years, there are about 2,000 dryers in the grain sector, and the total number of dryers in the agricultural reclamation system is not more than 00, and the level of drying mechanization is low. While the number of grain dryers in Japan is 10,000, the grain drying in the United States has been mechanized. Therefore, my country's grain dryer needs to be developed.
②Compared with foreign dryers, the gap between dryers in my country is poor manufacturing quality. Some production plants do not have the corresponding jis and equipment conditions, workshop-style production, the service life and performance of the dryer is not high.
③ There are many types of dryers and various types. Some products enter the market without formal jis identification, and the performance causes great losses to users.
④ The automatic control level of the dryer is low, and there is no moisture online test device, so that the grain moisture at the outlet of the dryer is accurately controlled.
⑤ China's grain drying can only use coal as a heat source, it is difficult to mz environmental protection and non-polluting grain drying requirements, although the use of a mechanical coal-fired furnace and heat exchanger combined heat source can mz not pollute requirements, but the hot blast stove Poor performance, high efficiency, high cost and short life. In addition, my country's dryer production plant and hot air furnace production plant are separated, resulting in a lack of matching of the dryer and the heat source.